<template>
  <text
    v-if="show && money"
    class="tui-amount-inwords"
    :style="{
      fontSize: size + 'rpx',
      color: color,
      fontWeight: fontWeight,
      padding: padding
    }"
    >{{ money }}</text
  >
</template>

<script>
export default {
  name: 'tui-amount-inwords',
  emits: ['change'],
  props: {
    value: {
      type: [Number, String],
      default: 0
    },
    size: {
      type: [Number, String],
      default: 32
    },
    color: {
      type: String,
      default: '#333'
    },
    fontWeight: {
      type: [Number, String],
      default: 400
    },
    padding: {
      type: String,
      default: '0'
    },
    show: {
      type: Boolean,
      default: true
    }
  },
  data() {
    return {
      money: ''
    }
  },
  watch: {
    value(newValue, oldValue) {
      this.money = this.getAmountInWords(newValue)
      this.$emit('change', {
        moeny: this.money
      })
    }
  },
  created() {
    this.money = this.getAmountInWords(this.value)
    this.$emit('change', {
      moeny: this.money
    })
  },
  methods: {
    trimAll: function (value) {
      return value.toString().replace(/\s+/g, '').replace('￥', '')
    },
    getAmountInWords(money) {
      money = this.trimAll(money)
      //汉字的数字
      let cnNums = new Array(
        '零',
        '壹',
        '贰',
        '叁',
        '肆',
        '伍',
        '陆',
        '柒',
        '捌',
        '玖'
      )
      //基本单位
      let cnIntRadice = new Array('', '拾', '佰', '仟')
      //对应整数部分扩展单位
      let cnIntUnits = new Array('', '万', '亿', '兆')
      //对应小数部分单位
      let cnDecUnits = new Array('角', '分', '毫', '厘')
      //整数金额时后面跟的字符
      let cnInteger = '整'
      //整型完以后的单位
      let cnIntLast = '元'
      //最大处理的数字
      let maxNum = 999999999999999.9999
      //金额整数部分
      let integerNum
      //金额小数部分
      let decimalNum
      //输出的中文金额字符串
      let chineseStr = ''
      //分离金额后用的数组，预定义
      let parts
      if (money == '') {
        return ''
      }
      money = parseFloat(money)
      if (money >= maxNum) {
        //超出最大处理数字
        return ''
      }
      if (money == 0) {
        chineseStr = cnNums[0] + cnIntLast + cnInteger
        return chineseStr
      }
      //转换为字符串
      money = money.toString()
      if (money.indexOf('.') == -1) {
        integerNum = money
        decimalNum = ''
      } else {
        parts = money.split('.')
        integerNum = parts[0]
        decimalNum = parts[1].substr(0, 4)
      }
      //获取整型部分转换
      if (parseInt(integerNum, 10) > 0) {
        var zeroCount = 0
        var IntLen = integerNum.length
        for (var i = 0; i < IntLen; i++) {
          var n = integerNum.substr(i, 1)
          var p = IntLen - i - 1
          var q = p / 4
          var m = p % 4
          if (n == '0') {
            zeroCount++
          } else {
            if (zeroCount > 0) {
              chineseStr += cnNums[0]
            }
            //归零
            zeroCount = 0
            chineseStr += cnNums[parseInt(n)] + cnIntRadice[m]
          }
          if (m == 0 && zeroCount < 4) {
            chineseStr += cnIntUnits[q]
          }
        }
        chineseStr += cnIntLast
      }
      //小数部分
      if (decimalNum != '') {
        let decLen = decimalNum.length
        for (let i = 0; i < decLen; i++) {
          let n = decimalNum.substr(i, 1)
          if (n != '0') {
            chineseStr += cnNums[Number(n)] + cnDecUnits[i]
          }
        }
      }
      if (chineseStr == '') {
        chineseStr += cnNums[0] + cnIntLast + cnInteger
      } else if (decimalNum == '') {
        chineseStr += cnInteger
      }
      return chineseStr
    }
  }
}
</script>

<style scoped></style>
